What a Water Engineer Taught Me About Saving Water (and Why It Matters More Than You Think)

 

When we talk about reducing waste, most people immediately think about plastic, food, or packaging. But over the years, I’ve come to realise that one of the most overlooked areas of waste is something we use every single day without much thought: water.

Not just the water we can see flowing from the tap, but the entire system behind it.

Recently, I found myself digging deeper into how our water systems actually work, and it completely changed how I approach water use at home and in small businesses. It made me realise that saving water isn’t just about being careful — it’s about understanding what’s involved in delivering it in the first place.

What’s really behind your tap?

It’s easy to assume water just “arrives” when we turn the tap on. But in reality, it’s part of a vast and complex system known as a water supply network.

This system includes everything from rivers and reservoirs to treatment plants, storage tanks, and miles of underground pipes delivering clean water to homes and businesses. Before it reaches you, water has usually gone through multiple stages of filtration, treatment, and testing to make it safe to drink.

If you’re curious about the scale of these systems, this overview of water supply networks gives a helpful introduction.

And after you’ve used it? It doesn’t just disappear. It becomes wastewater, which must be treated again before being returned safely to the environment.

When you stop and think about it, every time you turn on the tap, you’re drawing on an entire hidden system that has taken time, energy, and resources to maintain.

Why this matters for waste reduction

Water isn’t just a resource — it’s deeply connected to energy, chemicals, and infrastructure.

Every litre you use has been pumped (which uses energy), treated (which uses chemicals and processes), transported through pipes, and then cleaned again after it leaves your home or business.

So when we waste water, we’re not just wasting water — we’re wasting all of that too.

This is something I often come back to during Zerowaste Week, where the focus isn’t just on what we throw away, but on the resources we use every day. Water is one of the clearest examples of a resource we can easily overlook.

It’s also one of the easiest areas where small, consistent changes can make a real difference.

What a water engineer would tell you

When I explored this topic further, I came across the work of a water engineer, and it really helped me see the bigger picture.

Water engineers design and manage the systems that make sure we have safe, reliable access to water — from supply and treatment to drainage and flood control.

They’re thinking long-term: how to cope with growing populations, changing weather patterns, ageing infrastructure, and increasing demand.

But here’s the key takeaway that stayed with me: these systems are under pressure.

Climate change is affecting rainfall patterns. Infrastructure in many places is ageing. Demand continues to rise. And all of this means that the margin for waste is shrinking.

Which brings it back to us. Because while we can’t redesign national infrastructure, we can reduce the pressure we put on it.

7 practical ways to reduce water waste at home

This is where I always like to bring things back to simple, doable actions — the kind that don’t require perfection, just awareness.

1. Fix leaks immediately

A dripping tap might seem minor, but over time it can waste thousands of litres of water. Toilets are another common source of hidden leaks, especially if they’re running silently in the background.

2. Turn off the tap while brushing teeth

This is one of the easiest habits to change. Turning off the tap while brushing can save litres of water each time, and it quickly becomes second nature.

3. Shorten your showers

You don’t need to drastically cut your shower time. Even reducing it by one or two minutes can save a surprising amount over weeks and months.

4. Use a washing-up bowl

Running the tap continuously while washing dishes uses far more water than filling a bowl. It’s a simple shift that can make a noticeable difference.

5. Only run full loads

Whether it’s your washing machine or dishwasher, wait until you have a full load. This maximises efficiency and reduces unnecessary water use.

6. Collect “wasted” water

Catch the cold water while waiting for your shower or tap to heat up. You can use it for watering plants, cleaning, or even flushing the toilet.

7. Install simple water-saving devices

Tap aerators, low-flow showerheads, and dual-flush toilets are all relatively inexpensive and easy to install, but they can significantly reduce water usage over time.

Simple changes for small businesses

If you run a small business, water use can be even more significant — especially in hospitality, retail, or service-based settings.

The good news is that many of the same principles apply, just on a slightly larger scale.

Audit your water use

Start by identifying where water is used most. Kitchens, toilets, and cleaning processes are often the biggest contributors. Once you know where the water is going, you can start to reduce it.

Train your team

Creating awareness among staff is key. Encourage simple habits like turning taps off properly, reporting leaks quickly, and using equipment efficiently.

Upgrade where it matters

You don’t have to replace everything at once. Focus on high-impact areas such as taps, toilets, and appliances that are used frequently.

Rethink cleaning processes

Sometimes small adjustments — like switching from running water to spray-and-wipe methods — can lead to meaningful savings without affecting standards.

It’s also worth reviewing routines. Are things being cleaned more often than necessary, or using more water than needed? Small tweaks can add up quickly in a business setting.

Thinking beyond the tap

One of the biggest mindset shifts for me has been realising that water is part of a much wider environmental system.

When we reduce water waste, we’re also helping to lower energy use, reduce pollution, protect ecosystems, and ease pressure on infrastructure.

It’s all connected — and that’s something I come back to again and again when thinking about waste and sustainability.

If you’re looking for more ways to take a joined-up approach, you might also find these reduce waste ideas helpful.

Bringing it back to zero waste

At Zerowaste Week, we often talk about reducing what we throw away. But reducing waste isn’t just about what ends up in the bin.

It’s about using fewer resources, making more thoughtful choices, and becoming more aware of the systems that support our everyday lives.

Water is one of the clearest examples of this. It’s easy to overlook because it’s always there — until we pause and really consider what’s involved.

And once you do start to notice it, small changes begin to feel both natural and worthwhile.

A gentle place to start

If this all feels like a lot, don’t worry.

You don’t need to do everything at once. Start with one small change — fix a leak, shorten a shower, or turn off the tap while brushing your teeth.

Then build from there.

Because when it comes to water, just like with waste, small actions really do ripple outward.

And over time, those small actions become part of a more thoughtful, more sustainable way of living — at home and in business.